UNIVERSAL TRANSMITTER
DESCRIPTION
The universal transmitter transceiver is integral to the
overhead console. The only visible component of the
universal transmitter are the three transmitter push
buttons (4) at the front of the overhead console. The
buttons are marked with one, two or three illuminated
dots, respectively, for identification of each channel.
Each of the three universal transmitter push buttons
controls an independent radio transmitter channel.
Each of these three channels can be trained to trans-
mit a different radio frequency signal for the remote
operation of garage door openers, motorized gate
openers, home or office lighting, security systems or
just about any other device that can be equipped with
a radio receiver in the 286 to 399 MegaHertz (MHz)
frequency range for remote operation. The universal
transmitter is capable of operating systems using
either rolling code or non-rolling code technology. The system will not transmit operating signals if the Vehicle Theft
Security System is armed.
The universal transmitter cannot be repaired, and is available for service only as a unit. This unit includes the push
button switches and the plastic module.
DIAGNOSIS AND TESTING
UNIVERSAL TRANSMITTER
If the Universal Transmitter is inoperative, but the Electronic Vehicle Information Center (EVIC) is operating normally,
(Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE/UNIVERSAL TRANSMITTER - STANDARD PROCEDURE) for
instructions on training the Transmitter. Retrain the Transmitter with a known good transmitter as instructed and test
the Transmitter operation again.
If the unit is still inoperative, test the universal trans-
mitter with Radio Frequency Detector special tool as
described below:
1. Turn the Radio Frequency (RF) Detector ON. A
“chirp” will sound and the green power LED will
light. If the green LED does not light, replace the
battery.
2. Hold the RF detector within one inch of the
TRAINED universal transmitter and press any of
the transmitters buttons.
3. The red signal detection LEDs will light and the tool
will beep if a radio signal is detected. Repeat this
test for each button. If any button is inoperative,
replace the universal transmitter assembly, (Refer
to 8 - ELECTRICAL/OVERHEAD CONSOLE/UNI-
VERSAL TRANSMITTER - REMOVAL).
If both the Transmitter and the EVIC module are inop-
erative, (Refer to 8 - ELECTRICAL/OVERHEAD CON-
SOLE/ELECTRONIC
VEHICLE
INFO
CENTER
-
DIAGNOSIS AND TESTING) for further diagnosis.
Refer to the appropriate wiring information for com-
plete circuit schematic or connector pin-out informa-
tion.
8M - 166
OVERHEAD CONSOLE - SERVICE INFORMATION
LX